COMMUNICATING WITH MULTIPLE DEVICES

To communicate with and access data from multiple Modbus devices or sensors, each device has to have the following communication settings in common:

  1. Baud rate - communication speed of all connected devices has to be the same. (ex. 19200Baud)
  2. COM port - communication port on PC running Easy MODBUS Viewer or a Virtual COM port when connecting through a USB-to-serial (RS485, RS232, RS422) converter.
  3. Stop bits - communication setting for serial communication which signals the end of a data frame.
  4. Parity - parity bit is an extra bit that is often used to detect transmission errors in serial communication on which MODBUS runs.


Modbus Serial RTU

Uses cyclical redundancy checking and reads 16 bit Modbus register values.  Support has been added to V1.4.0 for reading 32 and 64 bit values as integers and floating point values.  Less common applications will use swapped register values or values requiring byte offsets, please contact me for custom configurations.  

Modbus Serial ASCII

Added functionality. More info coming soon.

MODBUS LOGGING

Rather than limiting the user to specific configurations a wide range of settings are allowed in this software.  Within reason the software does not limit the number of register channels that can be read from the modbus slave devices.  The software also allows logging to the CSV files at speeds of up to 250 ms.  Because of this, under certain conditions it is possible to log values faster than the speed of serial commuincations.  If this happens duplicate values will be logged, and the background on the data grid will turn yellow indicating this situation.   


Program does not specify what hardware to use.  Many types of serial hardware types are available, RS232, RS485, ect.  Please make sure you have the correct type of hardware for the device you are trying to read from.  I suggest the USB-COMi-M usb to serial converter from Serial Gear.  This device is reliable, configurable for most serial data types, and has LEDs for transmit and receive troubleshooting.  Other serial converters should work as well.  

USING WITH BARANI SENSORS

Perfect for use with all BARANI sensors which use MODBUS protocol to communicate.


METEOTEMP SETUP

Instructions and videos coming soon. 

MODBUS REGISTER SETTINGS

  • Temperature
  • Relative Humidity
  • Pressure
  • Dew point / Frost point

INPUTTING CALIBRATION VALUES 

Download our Calibration value calculator to help you get started here: Barani Sensor Calibration Calculator Excel 

The Calculator is able to calculate the following curve fits for your calibrated data: simple offset, linear, quadratic, cubic, quartic. NOTE: For higher order polynomial curve fits like quadratic, cubic and quartic curve fits, please verify that correction values outside of your calibration range are acceptable.

Temperature

Relative Humidity

METEOWIND SETUP

Instructions and videos coming soon. 

MODBUS REGISTER SETTINGS

Wind Speed

Wind Direction

SETTING WIND DIRECTION

By default, North is set 

SETTING AVERAGING TIME PERIOD

  • Anemometer samples wind speed at 10Hz (10 times per second).
  • By default, the anemometer wind speed is averaged 1/sec.

HARDWARE ACCESSORIES

Use Easy MODBUS Viewer with any of the following communication hardware types with the help of our Universal RS485 Converter Board: 

  • RS-485 with MODBUS ASCII & RTU
  • RS-422 with MODBUS ASCII & RTU
  • RS-232 with MODBUS ASCII & RTU

MOXA RS-485 to USB converter UPort 1100 Series

IMPORTANT! Undocumented features of Moxa USB converter models 1130, 1130i, 1150, 1150i when running RS485.  Please see instructions at the following link to configure your MOXA USB converter to run RS485 properly:


EASY MODBUS VIEWER SUPPORT FORM

We will reply usually within 48 hours on working days. We thank you for your patience.

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